APA (7th ed.) Citation

Prokosch, F. (1941). The skies of Europe (4th ed.). Harper & Brothers.

Chicago Style (17th ed.) Citation

Prokosch, Frederic. The Skies of Europe. 4th ed. New York, London: Harper & Brothers, 1941.

MLA (9th ed.) Citation

Prokosch, Frederic. The Skies of Europe. 4th ed. Harper & Brothers, 1941.